What treatment is also known as an herbal bath?

The correct treatment known as an herbal bath is balneotherapy. This practice involves the use of mineral-rich waters, often infused with herbs or natural extracts, for therapeutic purposes. The term derives from the Latin word "balneum," meaning bath, and it traditionally includes soaking in hot springs, mineral baths, or thermal healing waters.

Balneotherapy is recognized for its potential health benefits such as improving circulation, relieving muscle and joint pain, and promoting relaxation. The herbal components added to the bath can enhance these effects, making the experience not just a physical treatment but also one tailored to address specific health concerns through the properties of the herbs used.

In contrast, aromatherapy focuses primarily on the use of essential oils for psychological and physical well-being but does not necessarily involve baths. Thalassotherapy employs sea water and marine elements for its therapeutic effects, while hydrotherapy refers to the use of water for pain relief and treatment, which can include various techniques such as water massages, but it does not specifically indicate the use of herbs or a bath-like setting. Balneotherapy, however, distinctly combines herbal elements with bath treatment, making it the correct answer.